George welsh



N.PE|'ERS, PHOYILLITHOGRAPHER. WASHINGTON D C n A A UNITED STATES PATENTOFFICE.

GEORGE WELSH, OF WASHINGTON, DISTRICT OF COLUMBIA.

CHAIN AND FLANGE APPARATUS FOR OPENING AND CLOSING WINDOW-SHUTTERS.

Specification of Letters Patent No. 7,042, dated January 22, 1850.

T all whom t may concern Be it known that I, GEORGE VELSH, of the cityof I/Vashington, in the District of Columbia, ha ve invented new anduseful Improvements in Opening, Closing, and Fastening Vindow Shuttersand Blinds; and I do hereby declare that the following is a full andexact description thereof, reference being had to the accompanyingdrawings and to the letters of reference marked thereon.

My improvement consists in passing through the lower part of the windowframe, a sliding bar with two joints, or links, at its end, the extremeof which is hitched to a. stud, or pin, (l) on an arm extending from anut, or pulley, placed; to turn horizontally on a stud in the center ofa semi-circle,

formed by a curved flange, or rim which has one end extended a shortdistance in a straight line, t, which is placed at a proper distancefrom the stud in the center on a bottom of similar dimensions for thepurpose of supporting and guiding the links on the end of the bar in acircular and horizontal direction when it is moved either in or out,which bottom, with the center stud and flange are all firmly fastenedtogether, or cast in one piece, and screwed on the sill of the windows;the center stud to coincide with the joint pin of the hinge or axis ofmotion of the shutter. The nut, or pulley is connected with the shutterby an arm, or connecting pin, partly formed of a round plate, (E) whichis firmly fastened on the lower end of the shutter, the round parthitched to the nut or pulley, by studs and holes, in such manner that itwill cover the curved flanges, pulley and end of the bar. All being thusconnected, and the bar moved, in or out, the shutter will be movedaccordingly, and may be opened or closed atpleasure by pushing orpulling the straight bar; the curved flange serving to guide the links,when pushing, and the nut, when pulling. By making notches, at properplaces,

in the bar, as shown at and (b) in the drawings, and by fastening on theinside casing of the windows a metal plate for the notches to catch on,the shutter may be fastened, when open or closed, or may be set to anintermediate angle. The notch at (b) will receive one of the arms (e),of the center nut, D, when the bar is pushed in, and hold it fast. Ajoint may also be made on the bar, so that when it is drawn in theprojecting end will drop down close to the inside of the wall. The arm eon the center nut is an auxiliary to the fastening effected by thestraight bar and links for holding the shutter firmly in place when thestraightbar is pushed in.

In the accompanying drawings, letter A, represents the apparatus as itwould appear when all put together, with the exception of the connectingarm, between it and the shutter.

B, is the joint-ed bar, the end (l) of which is provided with a hole tohitch on the stud or an arm ac of the center nut, or pulley.

C, is the curved flange with' the center stud connected with it by thebottom; D, the center nut, or pulley with arms, studs or holes by whichto hitch the connecting arm between it and the shutter; E, the arm forconnecting the shut-ter with the other works; F, (Fig. 2,) is the platefastened on the inside casing, for the notches a, a, in the bar to catchon.

That I claim as my invention and desire to secure by Letters Patentis- 1. The combination of links and a center nut with a stationarycurved iange, exten sion to the chain, to guide the links in such amanner that they may be operated to turn the center pulley or nut eitherby pushing or pulling as herein described.

the pressure off of the links when the bar is pushed in and the shutterfastened as described.

Gr. WELSH.

Witnesses:

L. VVELsH, P. A. FITZHUGH.

